Title page for ETD etd-02272012-172501


Type of Document Master's Thesis
Author Bohora, Som Bahadur
Author's Email Address sbohor3@tigers.lsu.edu, energeticsom@gmail.com
URN etd-02272012-172501
Title Spatial Variability in Response of Deltaic Baldcypress Forests to Hydrology and Climate
Degree Master of Science (M.S.)
Department Renewable Natural Resources
Advisory Committee
Advisor Name Title
Keim, Richard Committee Co-Chair
Chambers, Jim Committee Co-Chair
Krauss, Ken Committee Member
Dean, Thomas Committee Member
Keywords
  • Dendrochronology
  • Redundancy discriminant analysis
  • Forest management
  • Tree rings
  • Coastal baldcypress forests
Date of Defense 2011-12-15
Availability unrestricted
Abstract
Changing hydrology and climate have significantly altered ecologically significant cypress-tupelo forests in the deltaic plain of the Mississippi River. Though local responses of these swamps to hydrology are relatively well understood, broad-scale evaluation of ecological response differences of deltaic wetland forests has been limited by the lack of site-specific coupled hydrologic and ecological data. Baldcypress tree-rings from twenty-two sites were used to examine the responses of coastal swamp forests throughout the deltaic plain to environmental variables. The responses of these forests to environmental variables varied spatially; however, broad-scale measures of deltaic hydrology were more correlated with tree radial growth than were climatic variables. A strong relationship between coastal water levels and river stage suggests that river stage often controls coastal water levels near the coast, so that even sites not locally hydrologically connected to the river experience broad-scale effects of annual variability in Mississippi river stage. Thus, even though the river is leveed, river stage appears to have significant impacts on forest productivity through linkages with coastal water levels.
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